I m wondering if it s necessary to have a colonoscopy, since i m almost positive i have IBS, not IBD. I m 65 now, & had functional colitis when i was 28-30. It was due to emotional factors. They found nothing wrong internally. I have had 2 unremarkable colonoscopies already - meaning nothing wrong. 1st one at 48 yrs., 2nd at 58 yrs., usually done every 10 yrs. i wanted to wait the 10 yrs., but my dr. thinks i should go since i m having symptoms. What do u think? Thank u!